<body>
   <pre id="error-log"></pre>
   <span id="container" style="color: green">
   </span>
   <div style="display: none">
      <span id="1">
         1 (black)
      </span>
      <span id="2">
         2 (green)
      </span>
      <span id="3">
         3 (green)
      </span>
      <span id="4">
         4 (black)
      </span>
   </div>
   <span id="status" style="color: red">
      FAILURE
   </span>
</body>
<script>
    if (window.testRunner)
        testRunner.dumpAsText();

   // verify all standard cases
   document.getElementById("container").insertAdjacentElement("beforeBegin", document.getElementById("1"));
   document.getElementById("container").insertAdjacentElement("afterBegin", document.getElementById("2"));
   document.getElementById("container").insertAdjacentElement("beforeEnd", document.getElementById("3"));
   document.getElementById("container").insertAdjacentElement("afterEnd", document.getElementById("4"));

   function assertThrows(func) {
      var testPassed = false;
      try {
         func();
         document.getElementById("error-log").textContent += "Expected exception missing.\n";
      } catch (e) {
         document.getElementById("error-log").textContent += "Caught expected exception: " + e + "\n";
         testPassed = true;
      }
      return testPassed;
   }

   // check that exceptions are thrown as required
   var passes = true;
   passes = assertThrows(function() {
      // should throw SyntaxError
      document.getElementById("container").insertAdjacentElement("blah", document.getElementById("1"));
   }) && passes;
   passes = assertThrows(function() {
      // should throw TypeError
      document.getElementById("container").insertAdjacentElement("beforeEnd", null);
   }) && passes;
   passes = assertThrows(function() {
      // should throw TypeError
      document.getElementById("container").insertAdjacentElement("beforeEnd");
   }) && passes;
   passes = assertThrows(function() {
      // should throw TypeError
      document.getElementById("container").insertAdjacentElement();
   }) && passes;

   var elt = document.createElement("div");
   passes = passes && (elt.insertAdjacentElement("beforeBegin", document.createElement("p")) == null);
   if (passes) {
      document.getElementById("status").style.color = "green";
      document.getElementById("status").innerHTML = "<br><br>PASS";
   }
</script>
